NiSi NIP-150-RGND1.2 150x170mm Reverse GND Filter 4-StopAchieve Balanced Exposure in High Contrast Scenes The NiSi ND16 150x170mm Reverse GND Filter is used to darken bright skies while maintaining normal exposure in other areas of the image. Ideal for landscapes with a bright horizon, this filter ensures true to life color and prevents infrared contamination. Specifications Filter Type: Reverse Graduated Neutral Density (GND) Density: ND16 (1. 2) 4 Stop Dimensions: 150x170mm Material: High quality optical